Direct Whole-Genome Sequencing of Cutaneous Strains of Haemophilus ducreyi

Haemophilus ducreyi, which causes chancroid, has emerged as a cause of pediatric skin disease. Isolation of H. ducreyi in low-income settings is challenging, limiting phylogenetic investigation. Next-generation sequencing demonstrates that cutaneous strains arise from class I and II H. ducreyiclades and that class II may represent a distinct subspecies.